Natural numbers - practice problems - page 8 of 94

Number of problems found: 1878

Geometric progression
For the following geometric progression, find the seventh (7th) term: 4, 12, 36, 108, .
Literacy ratio
The town's population is 311250. The ratio of women to men is 43: 40. If 24% of men and 8% of women are literate, then find the total number of literate persons in the town.
Susan 4
Susan went to school for 219 days in a full year. If her attendance is 75%, find the number of days on which the school was open.
Children
Of the estimated 2 billion children living in the developing world, approximately 400 million do not have access to safe drinking water. Approximately what percentage of children in developing countries do not have safe water to drink?
The population 3
The population of the town is 126800. It increases by 15% in the first year and decreases by 20% in the second year. What is the population of the town at the end of 2nd year?
Tricky result
Classic adding with percentages: Evaluate 28% of 450 + 45% of 280
Population growth 2
The present population of the town is 200,000. Its population increases by 10% in the first year and 15% in the second year. Find the population of the town at the end of the two years.
Students 48
If 80% of the students of a school are boys and 225 are girls, find the number of all students.
A fruit 4
A fruit seller had some apples. He sells 40% apples and still has 420 apples. How many apples originally he had?
An ice cream
An ice cream machine has 3 flavors - vanilla, chocolate, and strawberry. The ice cream can be served in 2 ways - in a cone or in a cup. Along with the ice cream, there are 5 options for toppings - hot fudge, caramel, nuts, cherries, and sprinkles. What is
A restaurant’s
A restaurant’s menu has 3 appetizers, 3 mains and 2 desserts. In how many way can a 3-course meal be ordered?
The marathon
Twelve athletes are joining the Topolcany Marathon Event. How many ways can the first, second, and third placers be chosen?
A band
A band played an encore at 2 of its last 4 shows. Considering this data, how many of the band's next 14 shows would you expect to have an encore?
A fair 2
A fair die is thrown two times. What is the probability that the sum of the score is almost 8?
Divisors 7
If 540=2²×3³×5, what is the number of all factors of 540?
52 cards
A hand of five cards is dealt from a pack of 52 playing cards. How many different hands can be dealt that contain at least three aces?
Three numbers
In three numbers, the first number is double the second number, and the second number is double the third. The average of the numbers is 21. Find the least number.
Consecutive odd numbers
Find three consecutive odd numbers whose sum is 93.
Locker combination
Todd forgot the first two numbers of his locker combination. The numbers can be any number 1 through 6. What is the probability that he will guess the first number correctly and the second number incorrectly?
Perfect square or cube
Would you classify 324 as a perfect square, perfect cube, both, or neither? ...

Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.